Photographic-plate holder.



No. 769,500. PATENTED SEPT. 6, 1904.

W. P. SIDELINGER. PHOTOGRAPHIG PLATE HOLDER.

APPLICATION FILED NOV. 18, 1903. NO MODEL.

UNITED STATES Patented September 6, 1904.

PATENT OEEICE.v

PHoToGRAPHlo-PLATE HOLDER.

SPECIFICATION forming part of Letters Patent N o. 769,500, dated September 6, 1904. Application filed November 18, 1903. Serial No. 181,574. (No model.)

T rtl/Z whom t may concern.-

Be it known that I, WILLIAM F. SIDELINGER, a citizen of the United States, residing in the city and county of Philadelphia, State of Pennsylvania, have invented a new and useful Improvement in Photographic-Plate Holders, of which the following' is a specification.

My invention relates to photographic-plate holders.

It consists of means for holding the screen in perfect parallelism with the negative, while giving it wide range and delicacy of adjustment to and from such negative.

It further consists of novel features of construction, all as will be hereinafter fully set forth.

In the drawings, Figure l is a plan view of my device, the slide being removed. Figs. 2, 3, and 4 are sections through the lines a y y, and c, respectively, the slide being shown in Figs. 2 and 4.

Similar numerals of reference indicate corresponding parts in the figures.

Referring to the drawings, l designates a box or frame provided with a hinged. door 2, on the inner side of which are the usual means 3 for supporting a negative 4. At the other side of the frame l is a slide 5, which moves in grooves in the usual manner.

6 designates a screen-holder frame in which is secured a holder 7, having a plurality of abutments 8 9, against either of which a screen 10 may be secured, being held in place by springs I1 and l2, respectively. As shown in Fig. 2, the screen is placed against the abutment 8 nearer the negative 4 and is held in place by the springs ll. The screenholder 7 is secured in the screen-holder frame 6 by means of screws 13, which engage in slots 14, so that the part 7 may be moved toward or from the negative 4. The holder-frame 6 is supported in the box l by means of laterally-projecting pins l5, moving in slots 16. Springs 17 bear against the pins 15, normally holding the frame 6 at its greatest distance from the negative 4.

At each side of the box l is mounted a bar 18, provided at each end with a cam 19 and provided at one end with a rack 20, which meshes with a gear 21 on a shaft 22. On the holder shaft 22 exterior of the box l is a button or thumb-piece 23, by which the shaft may be manually rotated.

' The operation is as follows: The negative being secured in position as shown in Figs. 2

and 4 of the drawings, the screen 10 may be placed against either of the abutments 8 or 9, as desired, the holder 7 having been first adjusted in the holder-frame 6 by means of the screws 13, playing in the slot I4. By these two means a wide variation of the distance of the screen from the negative is secured. Still further adjustment, combining range with great accuracy, is provided by means of the cams 19 riding' on the pins l5, by which the holder-frame 6 is moved toward or from the negative. It is evident that the operator by turning the button 23 moves both bars 18 and that the four cams 19 bear on the pins l5 at the four corners of the holderframe 6. rI`hese act to positively move the frame toward the negative or to permit its withdrawal therefrom by means of the springs 17. This provides the finest possible adjustment and at the same time assures perfect parallelism of the negative and the screen.

It is evident that various changes may be made by those skilled in the art which may come within the scope of my invention, and I do not, therefore, desire to be limited in every instance to the exact construction herein shown and described.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is`

l. Aphotographic-plate holder including a screen-holder frame and a screen-holder adjustable in said frame toward and from the negative-holder.

2. A photographic-plate holder including a holder-frame, a holder in said frame and separate means for adjusting said holder in said frame and said frame itself toward and from the negative-holder.

3. In a photographic-plate holder, a screenholder frame, a screen-holder in said frame, and slots and screws common to said screenand said frame by which said holder may be adjusted toward and from the negative-holder.

IOO

4. In a photographie-plate holder, a holderand Separate means for maintaining said holder frame provided with a plurality of means for in Suitable relation to each pair of Sald abut- IO separately engaging' a plate-holder and mainments.

taining said holder in parallel relation with l T 5 the negative. VILLlAM F. SlDELILGER.

5. In a photographie-plate holder, a holderfitnessesz frame provided with a plurality of pairs of JOHN A. VIEDERSHEIM,

abutments, each pair adapted to seat a holder GEO. L. COOPER. 

